Pneumatic-despatch apparatus.



PATENTED AUG. 23, 1904.

G. H. BURTON.

PNEUMATIC DESPATGH APPARATUS.

APPLICATION FILED NOV. 14, 1903.

2 SHEETS-SHEET 1.

N0 MODEL.

. v PATENTED AUG. 23, 1904, c. H. BURTON. v PNEUMATIC DESPATOH APPARATUS.

APPLIGATION II'LED NOV. 14, 1903.

' 2 SHEETS-SHEET 2.

N0 MODYEL,

3, through the stop device.

Patented August 23, 1904.

'S'TAT s PA -rE-NT QFFIQE.

CHARLEs 1-1. BURTON, 0E BosToN, MASSACHUSETTS, ASSIGNOR TO AMERICAN PNEUMATIC SERVICE COMPANY, OF DOVE DELA- W E, A CO PO ION OF DELAWARE.

PNEUMATlC-DESPATCH APPARATUS.

$EECIFICATIQN forming part of Letters Patent N0. 768,031, dated August 23, 1904.

Application filed Nqvember 14, 1903. Serial No. 181,120. (No model.)

To caller/ham it may concern:

Be it known that I, CHARLES H. BURTON, of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Pneumatic-Despatch Apparatus, of which the following is a specification.

My invention relates to new and useful improvements in terminals for pneumatic-despatch-tube apparatus, and relates especially to a device for preventing carriers after insertion into the transmitter from blocking the line by a backward movement.

My invention consists of certain novel features hereinafter described, and pointed out in the claims.

In the accompanying drawings, which illustrate a construction embodying my invention,

. Figure 1 is a side view of a transmitting-terminal, partly in section, showing a carrier inserted into the transmitting-terminal for despatch through the main line. Fig. 2 is a side elevation of a stop devicehereinafter described. Fig. 3 is a central sectional view of a stop device with parts in full lines. Fig. 1 is a cross-sectional view on the line X X, Fig. Fig. 5 is a side elevation with parts in section and showing the position of the parts when a carrier is about to be despatched.

Like letters of reference refer to like parts throughout the several views.

A represents a transmitting-terminal of the pneumatic despatch apparatus located in alinement with the table B, on which the carriers are placed preparatory to being. despatched. The opposite end of said terminal communicates with the transmission-tube C,

through which carriers are despatched to the opposite end of the tube-line. A suitable source of air-pressure for transmitting the mal position of the parts, as shown in Fig. 1,

this pressure passes down through the pipe F, valve G, and transmission-tube (1, with the Valve G closed to the terminal, as shown. In

this position of the parts, the branch tube D particularly tube C.

Priorto the use of this stop device the'car-- which slides the plunger N, having an oblique face at N, as shown. The upper end of said plunger N is provided with a rod N of smaller diameter, and located around said rod Nis a spring N the lower end of which bears against the upper end of the plunger N and the upper end bears against the under side of the cap L, and the tendency of said springis to hold the lower end N in the position shown in Figs. 1, 3, and 5. On the upper end of said rod N is a pin N which prevents the Located in the lower end of red N from being pulled entirely through the cap L. The up-and-down movement of the plunger N is controlled by the screw 0,

moving in the slot P of the cylinder K.

Withthe parts in the position shown in Fig.

1the carrier A is pushed from the table B through the valve E and striking the oblique face N of the plunger Nraises said plunger, so that it passes into the transmitter A into the position shownin Fig. 1. After this the valves H, G, and E are simultaneously moved by suitable mechanism from the positions shown in Fig. 1 to the positions shown in Fig.

' 5. During this movement of the valves certain pressure passing down through the pipe F will pass rearwardly through the valve G intothe terminal A and drive the carrier A backward against the straight edge of the plunger N, and the carrier is there held against rearward movement, as shown in Fig. 5, until the valves are completely reversed, when the pressure passing through the pipe D down through the valve E drives the carrierA through the valve G into the transmissionriers were often driven back into the outer valve, thereby not only injuring the terminal, but blocking the line, and it was necessary to take the terminal apart in order to set the parts in their proper positions.

By means of this device the carriers cannot run back into the valve E, and the carrier is held in the position shownin Fig. 5untilsu1ficient pressure is supplied to drive it through the tube C. After a carrier has passed into the transmission tube 0 the valves are returned to their normal positions (shown in Fig. 1) ready for the next operation. a N o mechanism is shown for moving these valves, as any suitable mechanism known in the art may be employed.

Having thus described the nature of my invention and set forth a construction embodying the same, what I claim as'new, and desire to secure by Letters Patent of the United States, is

1. In a pneumatic-despatch apparatus, a receiving-transmitter, a valve closing said transmitter to the atmosphere, and means independent of said valve for preventing the rearward movement of the carrier into the valve after insertion.

2. In a pneumatic-despatch apparatus, a receiving-transmitter, a valve closing the transmitter to the atmosphere, and means adapted to move out of the path of the carrier upon its insertion and to prevent rearward movement of the carrier into the valve.

8. In a pneumatic-despatch apparatus, a receiving-transmitter, a valve closing the transmitter to the atmosphere, and yielding means for preventingthe backward movement of the transmitter into the valve after the insertion of the carrier.

41. In a pneumatic-despatch apparatus. a receiving-transmitter, a valve closing the transmitter to the atmosphere, and means consisting of a cylinder having an internal yielding plunger adapted to yield to the carrier upon its insertion and to prevent the baclavard movement of said carrier into the valve.

5. In a pneumatic-despatch apparatus, a receiving-transmitter, a valve closing the transmitter to the atmosphere,'and yieldingmeans adapted to move out of the path of the carrier upon its insertion and to prevent the backward movement of the carrier into the valve after the insertion of the carrier.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 12th day of November, A. D. 1903.

CHARLES H. BURTON.

Witnesses:

A. L. Mnssun, A. R. LARRABEE. 

